A set of predicates and assertions for checking the properties of numbers. Most of the documentation is on the assertive page. End-users will usually want to use assertive directly.
To install the stable version, type:
install.packages("assertive.numbers")To install the development version, you first need the devtools package.
install.packages("devtools")Then you can install the assertive.numbers package using
library(devtools)
install_bitbucket("richierocks/assertive.numbers")is_even and is_odd check for even or odd numbers. is_divisible_by generalizes the concept.
is_finite, is_infinite, is_negative_infinity, and is_positive_infinity check for infiniteness.
is_nan and is_not_nan check for NaN (or not).
is_in_range checks for numbers in a range. is_in_closed_range, is_in_open_range, is_in_left_open_range, is_in_right_open_range, is_negative, is_non_negative, is_positive, is_non_positive, is_percentage, and is_proportion provide more specialized alternatives.
is_imaginary and is_real check for imaginary or real numbers.
is_whole_number check for whole numbers.
is_equal_to, is_not_equal_to, is_greater_than, is_greater_than_or_equal_to, is_less_than, and is_less_than_or_equal_to check relational operators.
Predicates all return a vector and have two corresponding assertions. For example, is_even has assert_all_are_even and assert_any_are_even.